tree cdd796f566be8ad27bcbdeb8f14863a128f7d600
parent c0f3f0f0ee5a38d9a4889dbdefacec59e2571f8a
author Arthur Heymans <arthur@aheymans.xyz> 1783623575 +0200
committer Nico Huber <nico.h@gmx.de> 1783845519 +0000

ch347_spi: Fix segfault with older libusb

Passing NULL for libusb_bulk_transfer()'s transferred argument is only
supported since libusb 1.0.21. Older versions unconditionally dereference
the pointer after a transfer, causing CH347 users to segfault.

Always provide storage for the transferred byte count, even where the
value itself is not consumed.

Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Change-Id: I30986a847f953c0390421389a81fd4bb6a6a6964
Reviewed-on: https://review.sourcearcade.org/c/flashprog/+/563
Reviewed-by: Nico Huber <nico.h@gmx.de>
Tested-by: Nico Huber <nico.h@gmx.de>